Activation Error

Hi Guys,


I am having some issue with activation.  I am currently using Solid Work 2010 64bit on a window 7 pro.  It has been working fine for the past few months.  Due to an unfortunate event, I had to reinstall Solid Work on the same computer.

After installation, I can't activate it.  I got the following error.  Please help.

Thanks!

SolidworksAdministration